diff -r 9537bf1c4853 -r 5b7a9633cfa8 src/HOL/Lifting_Sum.thy
--- a/src/HOL/Lifting_Sum.thy	Sun Nov 02 18:21:14 2014 +0100
+++ b/src/HOL/Lifting_Sum.thy	Sun Nov 02 18:21:45 2014 +0100
@@ -2,7 +2,7 @@
     Author:     Brian Huffman and Ondrej Kuncar
 *)
 
-header {* Setup for Lifting/Transfer for the sum type *}
+section {* Setup for Lifting/Transfer for the sum type *}
 
 theory Lifting_Sum
 imports Lifting Basic_BNFs